Gaarden



A. T. LOFTSGAARDEN.

DOOR CHECK AND CLOSER.

APPLICATION FILED JULY 5.1917- 1,304,-333? Patented Ma 20, 1919.

2 SHEETS--SHEET A. T. LOFTSGAARDEN. I DOOR CHECK AND CLOSER.

APPLICATION FILED JULY 5; I951.

1,3 04,53 33 Patented May 20, 1919.

2 SHEETS-SHEET 2- .I 1; i

W ww m UNITED STATES PATENT OFFICE.

1 I ALBERT T. LOFTSGAABDEN, OF POWELL, WYOMING, ASSIGNOR T POWELL MANUFAC- TUBING COMPANY, OF POWELL, WYOMING, A CORPORATION.

DOOR CHECK AND'GLOSER.

Specification of Letters Patent.

Patented May 20, 1919.

4 Application filed J'uly 5.1917. Seria1No.178.732.

Checks and Closers, of which the following is a specification. My present invention relates to checks in which liquid is employed as a retarding agent; and it consists in the simple, efficient and durable check hereinafter described and definitely claimed.

. The novel check is designed more particu- I larly for use in combination with a door closenof my invention and is so disclosed herein, though it is to be understood that the check may be employed in any other-relation to which it is applicable.

hereby made a part hereof:

Figure 1 is a top plan view showing the check as connected with the door closer.

Fig. 2 isa vertical transverse section on line 2-2 of Fig. 1.

Fig. 3 is a centralvertical longitudinal section.

Fig. 4 is a similar view showing the piston at the extreme end of its stroke.

80 Figs. 5, 6, 7, Sand 9 are detail vertical transverse sectional views, taken respectively 'on the lines 55, 66, 7-7, 88, and 99 of Fig. 4.

Similar numerals of reference designate a 85 corresponding parts in all of the views of the drawings.

It will suffice for an understanding of the door closer to say that it comprises a C111V1- linear arm 1 disposed horizontally and pivotally connected at 2 with a door casing 3,

Wyoming, have invented certain my novel check serves as its name imports to retard the closing of the door, and it also serves ncidental to the completion of the 65 closing movement to suddenly release the door from retardation so as to enable the door latch to surely engage its .complementaryv keeper.

Among other-elements my novel check comprises a cylinder 10. This cylinder is provided at its forward end witha lateral surgingxchamber 11-. Also at said end, the cylinder is provided with a forward exten s 1on 12through which a bolt 13 passes to pivotally connectthe forward'end of the check to the closer arm 4; asleeve14 on the bolt being interposed between the bolt 13 and the arm 4 to allow both thecheck and the arm to swing freely without any tendv ency of binding. Interiorly the cylinder 20 In the accompanying drawmgs which are 10 is provided alongits bottom with a flat longitudinal portion 15, and its rear end is threaded as indicated by 16.

Arranged in the rear end of the cylinder .10 and engaging the thread 16 thereof is an exteriorly threaded stuffing box or gland 20, and arranged to work rectilinearly through the sand stufling box or gland 20 is the rod 30 of the piston 31.

A clamp 40 is fixed by a screw 41 on the rear portion of the piston rod 30, and the said clamp, which is disposedunder the piston rod, is pivotally connected through a bolt 42 to the closer arm 1; a sleeve 43 on the bolt being interposed between the bolt 42 and the'arm 1 to assure free swinging movements of both of said elements.

Adjacent to its forward end the piston rod 30-is threaded,'as indicated by 32, and at said end the piston rod is provided with a fiat head 33, as illustrated.

The piston 31 is of cage type, c. 6., is made up of a rear wall 34, apertured at 35, a circular wall 36 having apertures 37, and a front wall 38 having a central aperture 39 and peripheral apertures 50. The rear wall is also provided with a central interiorly threaded portion 51 to receive and engage the thread on the forward portion of the piston rod 30. The said rear wall is of a size to snugly occupy the cylinder 10 and is provided with a flattened portion 52 which, as clearly shown in Fig. 7, is opposed to and movable longitudinally of the cylinder on the interior longitudinal fiat portion 15 of the cylinder 10 to prevent rotation of the piston without interfering with free rectilinear inovement thereof in the cylinder.

Loosely arranged in the cage-like piston 31 and freely movable between the forward end of the piston rod 30 and the front wall of the piston is a disk-like valve 60 having a central aperture 61.

In practice the cylinder 10 and the surging chamber 11 are filled with a suitable liquid, preferably oil of proper consistency.

The operation of the check is such that incidental to the opening of the door, the piston is drawn rearwardly in the cylinder and the valve moves to the forward wall of the cage-like piston, with the result that the oil is permitted to freely pass through the piston and the opening operation is not interfered with. When, however, the door is closed the oil, acting against the valve in the piston, forces the valve against the aper- 'tures in the rear wall of the piston and consequently said apertures are closed, the forward movement of the piston is retarded,

' and the closing movement of the door is checked. During the completion of the closing movement of the door the piston enters the surging chamber 11, whereupon the oil will rush to both sides of the piston and relieve the pressure against the forward side of the valve and allow the door to quickly complete the closing movement to assure engagement of its latch with the keeper.

It will be noted that the rear wall of the piston extends radially outward beyond the circular side wall thereof also, that by adjusting the piston rod in the piston or the piston on the rod, the centrally-apertured valve will be moved away from or toward the apertured rear wall of the piston. In this manner the piston and valve can be readily adjusted to suit the consistency of .the oil employed and to regulate the check to L the weight of the door and the tension of the spring in the closer.

It will be gathered from the foregoing that my novel check is calculated to preclude violent closing of a door; also, that the check 7 is compact and neat in appearance, and that it is so constructed and arranged thatit is well adapted to withstand the usage to which devices'of analogous character are ordinarily subjected.

Having described my invention, what I claim and desire to secure 'by Letters Patent, is:

1. The combination in a liquid check, of a cylinder having a lateral surging chamber, and a piston movable in said cylinder and having a rod extending beyond one end of the cylinder; said piston being of cage-like form and adjustable on its rod, and a disklike valve movable in the cylinder and hav- 1,3oc,ssa

ing a central aperture opposed to the end of the rod.

2. The combination in a liquid check, of a cylinder having a lateral surging chamber at one end, a piston movable in the cylinder and a piston rod extending beyond the opposite end of the'cylinder; said piston being threaded and adjustable on said rod and beingof cage-like form and provided with apertures in its rear wall, and said rod being provided with a'flattened forward end, and a disk-like valve centrally apertured and movable in the piston and opposed to i the flattened forward end of the piston rod.

rest between the bolt and an element arranged in parallelism with and connected with the extension, a piston movable in the cylinder and having a rod extending through the opposite end thereof, a lateral arm secured on said rod, a bolt arranged 'in' and extending laterally from said arm,

and a sleeve surrounding and retained on the laterally extending portion of the bolt and adapted to rest between the bolt and an element arranged in parallelism with and connected with the arm.

i. The combination in a liquid 11801;, of a cylinder, a cage-like piston having aper-'- tures in its rear wall, a rod on which the piston is threaded and adjustable, and a disk-like apertured valve movable in the piston with its aperture opposed 'tothe end.

of the piston rod.

. 5. The. combination in a liquid check, of i a cylinder having a surging chamber at its forward end, a cage-like piston movable in said cylinder and having a rear wall of comparatively large diameter and apertures therein, a rod on which the piston is threaded and adjustable, andan apertured valve in the piston.

6. The combination in a liquid check, of

a cylinder having a surging-chamber, an open-work piston movable in the cylinder and having an apertured rear wall, a valve movable .in the piston toward and from said apertured wall, and a rod connected and movable with the piston and extending through one end of the cylinder.-

7. The combination in a liquid check, of

a cylinder adapted to contain liquid and having a lateral surging chamber, an open-- work piston movable in the cylinder and having its wall remote from the surging chamber apertured and also having a rod extending outside the cylinder, and a valve movable in said piston and toward and from said apertured wall thereof.

8. A liquid check comprising a cylinder having a surgin chamber, an open-work piston movable 1n the cylinder and said chamber thereof and having an apertured end wall, and a valve movable in the' piston with respectto said end wall thereof, whereby it is adapted to retard the movement of the piston until the same reaches the surg- In testimony whereof I aflix my signature in presence of two Witnesses.

ALBERT T. LOFTSGAARDEN. Witnesses:

F, C. REVEBLE, H. C. LOFTSGAARDEN. 

